Geeetech

I have read a few different post with the same problem.
I bring two items into Cura 4.2.1 and assign extruder 0 to one part, and extruder 1 to the other part.
I select both parts, merge, then slice.
When I preview the part, it only indicates 1 extruder as doing the hole part.
When I go into the printer manager , under machine settings, in the G-Code start up window, I add the following :

M163 E0 P1.00; Set Left to 100%
M163 E1 P0.00; Set Right to 0%
M164 E0; Save Mix

M163 E0 P0.00; Set Left to 0%
M163 E1 P1.00; Set Right to 100%
M164 E1; Save Mix

I then resliced my part again, and got the same results.
I then loaded the g-code into my A20M 3Dprinter.

It printed great, until it got to the color change.
The hot end lifted , moved to the far front left, paused for about 20 seconds.
Then went into thermal failure.
I printed other mono colored items and it worked.
I tested the extruders work because I tested them independently.
I checked and made sure all my extruder settings are the same.

Any body got an Idea that My fix my problem?
Any Help will be greatly appreciated.

I think it should be S0, S1 S2...etc instead of E0

M163 S0 P1.0
M163 S1 P0.0
M164 S0 ; set T0 mixing ratio to full right
M163 S0 P0.0
M163 S1 P1.0
M164 S1 ; set T1 mixing ratio to full left
M163 S0 P0.5
M163 S1 P0.5
M164 S2 ; set T2 mixing ratio to even mix

Thank you

forgot to note this is extracted from my S3D